<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title id="title">
        {{title}}
    </title>
</head>
<body>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
    <script>
        let app = new Vue({
            el:'#title',
            data(){
                return{
                    title: 拎包
                }
            }
        })
    </script>
</body>
</html>